Are shooting raw images?
If yes,you are using a older version of Lightroom. You need to upgrade the Lightroom to 5 or 6.
Convert your Sony raw images to DNG raw images using the free Adobe DNG Converter program. Then import the DNG versions into Lightroom.
'Adobe DNG Converter' is not part of Lightroom (or Photoshop), but a separate (stand-alone) program.
You 'Run' the program, select the folder of Sony images, select a folder to output the DNG files.
Thank you very much for taking the time to answer me. I will follow your advice.